What do evil willows mean in the Old Yellow Calendar?

The willows on the Gregorian calendar are the "earth deer" lodge for 28 nights, which is extremely fierce.

It must be one of the twelve stars, but it is not "black" but "auspicious day".

The "black" he wrote is the day of the underworld, fierce. This is a mistake. Because of twelve satellites, black and yellow are defined as follows:

Building, full, flat, black; Apart from danger, determination and yellow, success and openness can be used, and closing and breaking are unequal.